PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Neutrino Physics and Astrophysics
Radon contamination measurement in the SuperNEMO demonstrator
Y.Β Vereshchaka* and Β On behalf of the SuperNemo Collaboration
Full text: pdf
Pre-published on: March 04, 2024
Published on: March 22, 2024
The neutrino, as a neutral particle can be identical to its antiparticle, i.e, a Majorana particle.
SuperNEMO aims at searching for the neutrinoless double beta decay (0πœˆπ›½π›½), whose observation
would prove that the neutrino is a Majorana particle.
The 0πœˆπ›½π›½ process, beyond the Standard Model, is very rare and the level of background should
be extremely small.
One source of background comes from the 222Rn emanation from the detector components or
diffusion from the air of the laboratory towards the tracker. The daughter isotope, of 222Rn, the
214Bi can by (𝛽,𝛾) disintegration produce two electrons with an energy around 3 MeV and therefore
constitute a source of background for 0πœˆπ›½π›½. The SuperNEMO demonstrator should prove the
capacity to reduce the 222Rn activity to to a level less than 0.15 mBq/m3. Here, I present the
preliminary measurement of the 222Rn activity in the demonstrator, based on first data acquired
without shieldings, without injection of Radon free air in the antiradon tent, and purification of
the tracker gas by the Radon trap.
DOI: https://doi.org/10.22323/1.441.0292
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